Polybag
A polybag is a type of packaging made of thin, flexible, plastic film or plastic textile. Polybags are used for containing and transporting goods. Most polybags are heat sealed together. At the beginning of the invention of polybags, it was hailed by people because it is easy transportable and cheap. Plastic bags have been known to cause a lot of environmental damage. A single plastic bag can take up to 1000 years, to decay completely. This makes the bags stay in environments longer, in turn leading to great build-up on the natural landscape. In other words, the more plastic bags you use, the greater the chances of environmental damage. Plastic bags are extremely durable. In case you are thinking of this as an advantage, just bring to mind an image of the huge landfill that 0ne visited on the city outskirts, the other day. In most probability, majority of the rubbish present there will comprise of plastic bags only. In other words, plastic bags have led to a great increase in the pollution levels. So we should aware of the bad effects of poly bags and should avoid the use of poly bag in our daily life.
Acid Rain
Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals, and infrastructure. Acid rain is caused by emissions of carbon dioxide, sulfur dioxide and nitrogen oxides which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results. Nitrogen oxides can also be produced naturally by lightning strikes and sulfur dioxide is produced by volcanic eruptions. The chemicals in acid rain can cause paint to peel, corrosion of steel structures such as bridges, and erosion of stone statues.
Electronic mail or simply E-mail is very much popular now-a-days for its speedy transmission of information’s and cost effectiveness. Hence information provided by a sender is delivered asynchronously to a point where it can be retrieved and processed later on by one or more recipients of the sender’s choice. In an E-Mail system, there is a number and the sender keeps on dialing the desired number till he/she is successful. Once it is connected, the PC terminal of the sender sends the message to the PC terminal of the recipient at a very high speed. There is no need of any physical presence of both the sender and the receiver. The sender can enter the message and the receiver can retrieve it whenever he/she is free. The message will remain in PC’s memory. The transmission of messages is usually done through landlines (telephones) or satellite communications or through marine cables. E-mail has lot of advantages to its credit. It is cost effective. Very less money is required In comparison to other transmission device. It is time saver. Within very short time messages can be sent. There is no need of presence of either the sender or the receiver. Once the message is entered into PC’s it will remain in the receiver PC’s memory. E-mail transmission is very speedy. It is four times faster than FAX and ten Times faster than telex. There is the system of using password which each subscriber can choose to use. Hence E-mail gives security of message.
Environment Pollution
All the ingredients that we have around us are jointly known as environment. Environment pollution implies the contamination of the surroundings. Any abnormal change of environment in chemical, physical and biological characteristics in environment is called environment pollution. Environment is the whole system of our existence. Our environment is becoming polluted everyday for several reasons. Human beings mainly pollute environment. Massive industrialization is an important cause of environment. Smoke from motor vehicles also pollutes environment. Serious environment pollution occurs in big cities because buses, trucks and cars play in the streets everyday and emit smoke. Mills and factories also pollute water. They throw their waste products into rivers and canals. By burning wood and melting pitch for road construction people make more smoke and pollute air. We use pesticide in our crop fields. It also pollutes our environment. Indiscriminate cutting of trees has also turned unbalanced environment. The ecological balance is being lost as a result of environment pollution. If we all desire to live a healthy and tranquillized life, we should make our environment clean and free from pollution. We should be all whole-heartedly in keeping our environment fit for habitation.
Internet
Internet is a computerized network of information. It is the greatest invention in the communication system. It is the worldwide network of computer. Its uses and functions are smooth, easy and rapid. A students who knows just the keys of computer, can communicate anywhere he wishes. Internet communication is now the latest communication in the world. A computer and a telephone connection are required to get an Internet connection. There are two types of Internet such as Dial up and Broad Band. Internet has great usefulness. To get appropriate information a person has to communicate in the appropriate address. One can also go to a search engine like Yahoo, Goggle for finding particular page or a piece of information. A search engine is a system through which you can search for information on Web pages containing that information. By using Internet students can go through several books from the libraries without going there. They can seek information regarding admission to different foreign universities. But it is a matter to sorrow that many people of Bangladesh do not have still access to Internet because it is still costly and not easily available.
The National Memorial
National Martyrs’ Memorial is one of the greatest monuments in the history of Bangladesh. It is located at Savar, about 35 km north-west of Dhaka, symbolizes the velour and sacrifice of the martyrs who laid down their lives for the liberation of Bangladesh. It was designed by Syed Mainul Hossain. Plans for the monument were initiated right after the independence, in 1972. The main structure and the artificial lake and other facilities were completed in 1982. The monument is composed of 7 isosceles triangular pyramid shaped structures, with the middle one being the tallest. The highest point of the monument is 150 feet. There is an artificial lake, and several mass graves in front of the main monument. The architect has used concrete for the monument while all the other structures and pavements of the complex are made of red bricks. It symbolizes that it is built with concrete but made of blood. Once one enters the complex through the main gate he or she can see the monument axially but to reach it one has to walk through different ups and downs of pavements and cross an artificial lake by a bridge-all these represent the struggle for independence. The most moving sight of the complex is the several graves of the martyred freedom fighters: close to the tower.
Dowry System
Dowry means property or money brought by a bride to her husband when they get married .Now a days the system of giving and taking dowry in marriage is more prevalent in Bangladesh. In Bangladesh this is seen to be major problem. In the Bangladeshi society this system is treated as a serious problem. Wife is inhumanly tortured and killed by her husband for dowry. Most of the parents are poor. They cannot keep up their word they give before marrying off their daughters. This leads to chaos and hellish unhappiness. However, the first thing to be done to stop this malpractice is to grow awareness among all. Movement against dowry system should declare right now. We cannot get ride of this social vice by taking social reformative works urgently.
Arsenic pollution
Arsenic pollution means arsenic contaminated water. Of late arsenic pollution has become one of the most health hazards in Bangladesh. By drinking arsenic water, people get the disease. Arsenic is a fatal poison. It has been deposited in that layer of the soil from here our tube-wells pump out water. As a result in most areas of Bangladesh tube-well water in contaminated with arsenic. Arsenic pollution has made the scarcity of drinking water acute though our country is water-rich. The irony of fate is that “water, water everywhere nor a drop to drink.” It is a hard nut to crack. Our ignorant people are drinking arsenic polluted water from tube wells and are human being affected by arsenicosis. Those who do not eat fish and vegetables are easily affected. Arsenic is such a poison that damages all the vital organs or after another resulting in the subsequent death of the sufferer. Arsenicosis has no remedy nor has it any antidote. Hence arsenic pollution demands utmost attention. An affected person should drink arsenic free water and take vitamins A,C,E to come round. Arsenic polluted water has been ter5med as the killing water. There has been worldwide awareness of this problem. Aids from different corners are reaching. Deep tube wells rainwater, reservoirs, surface water treatment, etc. may be the pragmatic measures to minimize the problem to a great extent.
Tree plantation
Tree plantation means the process of planting trees. Now a day, it has become a social movement in our country. Trees are a great boon to us. They are related with our life and well-being. The boons and benefits derived from them are too many to count. Trees provide us shelter, food, fruits, firewood, timber and oxygen. We get vitamins from fruits. They prevent soil erosion, air pollution and floods. They also effectively prevent the spread of the desert and landslides. They are essential to maintain ecological balance and preservation of fauna. We all should plant and grow more and more trees and protect them. Social forestry should be taken on a large scale and trees should be grown all around where in space. Trees add to the beauty and quality of our life and living. We have to plant trees in every bare space of land, the sea beaches, the low-lying areas, the road sides should be brought under deforestation. We cannot think our existence without trees. People should grow more and more trees to improve our adverse situation. The result of tree plantation will be positive for human being in every sphere of life.
The International Mother Language Day
The international mother language day is a day, which is observed internally. It is related to the mother language of the world. As a result of the proposition of Bangladesh government, the day was recognized by UNESCO. From then the day came into existence. People generally pass the day by way of attending the seminar on the day. They paid a wreath in the Shaheed Minar. At that time everybody is barefooted. They go there with a procession. People who takes part in the procession are singing a chorus “Amar Bhiar Rokte Ranghano Ekushey February, Ami ki Bhulite pari”. The day has a great significance for us because on that day of 1952, our Golden sons laid down their valuable lives for the recognition of our mother tongue. As a Bengali, I am proud of the day as the day got recognition internationally and it is now observed all over the world.